If you have forgotten your password, the forgotten password feature should get you a new password to login. However, if you were level 1 and haven't logged in for over 9 months, you account will have been deleted and you will need to make a new one.

You will probably need to contact an admin directly on this issue then. Go to http://support.swcombine.com/ and fill out a ticket providing as much info as possible including handle, email address and possibly any other details you can remember to help convince them that you are the genuine owner of the account.